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[PATCH v2] ARM: vfp: Add missing VFP instructions to neon_support_hook

Mark-PK Tsai posted 1 patch 12 months ago 
arch/arm/vfp/vfpmodule.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
[PATCH v2] ARM: vfp: Add missing VFP instructions to neon_support_hook
Posted by Mark-PK Tsai 12 months ago 
Add the missing "Unconditional Advanced SIMD and floating-point
instructions" in [1] to the VFP undef hook.

This commit addresses the issue reported in [2], where
executing the vudot instruction on a platform with FEAT_DotProd
support resulted in an undefined instruction error.

Link: https://developer.arm.com/documentation/ddi0597/2023-06/?lang=en [1]
Link: https://lore.kernel.org/lkml/20230920083907.30479-1-mark-pk.tsai@mediatek.com/ [2]
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
---
 arch/arm/vfp/vfpmodule.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 7e8773a2d99d..b68efe643a12 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -800,6 +800,24 @@ static struct undef_hook neon_support_hook[] = {{
 	.cpsr_mask	= PSR_T_BIT,
 	.cpsr_val	= PSR_T_BIT,
 	.fn		= vfp_support_entry,
+}, {
+	.instr_mask	= 0xff000800,
+	.instr_val	= 0xfc000800,
+	.cpsr_mask	= 0,
+	.cpsr_val	= 0,
+	.fn		= vfp_support_entry,
+}, {
+	.instr_mask	= 0xff000800,
+	.instr_val	= 0xfd000800,
+	.cpsr_mask	= 0,
+	.cpsr_val	= 0,
+	.fn		= vfp_support_entry,
+}, {
+	.instr_mask	= 0xff000800,
+	.instr_val	= 0xfe000800,
+	.cpsr_mask	= 0,
+	.cpsr_val	= 0,
+	.fn		= vfp_support_entry,
 }};
 
 static struct undef_hook vfp_support_hook = {
-- 
2.18.0
Re: [PATCH v2] ARM: vfp: Add missing VFP instructions to neon_support_hook
Posted by Mark-PK Tsai (蔡沛剛) 11 months, 2 weeks ago 
On Mon, 2023-09-25 at 21:17 +0800, Mark-PK Tsai wrote:
> Add the missing "Unconditional Advanced SIMD and floating-point
> instructions" in [1] to the VFP undef hook.
> 
> This commit addresses the issue reported in [2], where
> executing the vudot instruction on a platform with FEAT_DotProd
> support resulted in an undefined instruction error.
> 
> Link: 
> https://developer.arm.com/documentation/ddi0597/2023-06/?lang=en [1]
> Link: 
> https://lore.kernel.org/lkml/20230920083907.30479-1-mark-pk.tsai@mediatek.com/
>  [2]
> Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
> ---
>  arch/arm/vfp/vfpmodule.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
> index 7e8773a2d99d..b68efe643a12 100644
> --- a/arch/arm/vfp/vfpmodule.c
> +++ b/arch/arm/vfp/vfpmodule.c
> @@ -800,6 +800,24 @@ static struct undef_hook neon_support_hook[] =
> {{
>  	.cpsr_mask	= PSR_T_BIT,
>  	.cpsr_val	= PSR_T_BIT,
>  	.fn		= vfp_support_entry,
> +}, {
> +	.instr_mask	= 0xff000800,
> +	.instr_val	= 0xfc000800,
> +	.cpsr_mask	= 0,
> +	.cpsr_val	= 0,
> +	.fn		= vfp_support_entry,
> +}, {
> +	.instr_mask	= 0xff000800,
> +	.instr_val	= 0xfd000800,
> +	.cpsr_mask	= 0,
> +	.cpsr_val	= 0,
> +	.fn		= vfp_support_entry,
> +}, {
> +	.instr_mask	= 0xff000800,
> +	.instr_val	= 0xfe000800,
> +	.cpsr_mask	= 0,
> +	.cpsr_val	= 0,
> +	.fn		= vfp_support_entry,
>  }};

Could someone please kindly review this patch?
Thanks.
Re: [PATCH v2] ARM: vfp: Add missing VFP instructions to neon_support_hook
Posted by Russell King (Oracle) 11 months, 1 week ago 
On Wed, Oct 11, 2023 at 02:49:44AM +0000, Mark-PK Tsai (蔡沛剛) wrote:
> On Mon, 2023-09-25 at 21:17 +0800, Mark-PK Tsai wrote:
> > Add the missing "Unconditional Advanced SIMD and floating-point
> > instructions" in [1] to the VFP undef hook.
> > 
> > This commit addresses the issue reported in [2], where
> > executing the vudot instruction on a platform with FEAT_DotProd
> > support resulted in an undefined instruction error.
> > 
> > Link: 
> > https://developer.arm.com/documentation/ddi0597/2023-06/?lang=en [1]
> > Link: 
> > https://lore.kernel.org/lkml/20230920083907.30479-1-mark-pk.tsai@mediatek.com/
> >  [2]
> > Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
> > ---
> >  arch/arm/vfp/vfpmodule.c | 18 ++++++++++++++++++
> >  1 file changed, 18 insertions(+)
> > 
> > diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
> > index 7e8773a2d99d..b68efe643a12 100644
> > --- a/arch/arm/vfp/vfpmodule.c
> > +++ b/arch/arm/vfp/vfpmodule.c
> > @@ -800,6 +800,24 @@ static struct undef_hook neon_support_hook[] =
> > {{
> >  	.cpsr_mask	= PSR_T_BIT,
> >  	.cpsr_val	= PSR_T_BIT,
> >  	.fn		= vfp_support_entry,
> > +}, {
> > +	.instr_mask	= 0xff000800,
> > +	.instr_val	= 0xfc000800,
> > +	.cpsr_mask	= 0,
> > +	.cpsr_val	= 0,
> > +	.fn		= vfp_support_entry,
> > +}, {
> > +	.instr_mask	= 0xff000800,
> > +	.instr_val	= 0xfd000800,
> > +	.cpsr_mask	= 0,
> > +	.cpsr_val	= 0,
> > +	.fn		= vfp_support_entry,
> > +}, {
> > +	.instr_mask	= 0xff000800,
> > +	.instr_val	= 0xfe000800,
> > +	.cpsr_mask	= 0,
> > +	.cpsr_val	= 0,
> > +	.fn		= vfp_support_entry,
> >  }};
> 
> Could someone please kindly review this patch?
> Thanks.

And if someone drops it into the patch system then it might get applied
before the merge window.

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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Re: [PATCH v2] ARM: vfp: Add missing VFP instructions to neon_support_hook
Posted by Xuewen Yan 11 months, 1 week ago 
On Wed, Oct 11, 2023 at 10:51 AM Mark-PK Tsai (蔡沛剛)
<Mark-PK.Tsai@mediatek.com> wrote:
>
> On Mon, 2023-09-25 at 21:17 +0800, Mark-PK Tsai wrote:
> > Add the missing "Unconditional Advanced SIMD and floating-point
> > instructions" in [1] to the VFP undef hook.
> >
> > This commit addresses the issue reported in [2], where
> > executing the vudot instruction on a platform with FEAT_DotProd
> > support resulted in an undefined instruction error.
> >
> > Link:
> > https://developer.arm.com/documentation/ddi0597/2023-06/?lang=en [1]
> > Link:
> > https://lore.kernel.org/lkml/20230920083907.30479-1-mark-pk.tsai@mediatek.com/
> >  [2]
> > Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
> > ---
> >  arch/arm/vfp/vfpmodule.c | 18 ++++++++++++++++++
> >  1 file changed, 18 insertions(+)
> >
> > diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
> > index 7e8773a2d99d..b68efe643a12 100644
> > --- a/arch/arm/vfp/vfpmodule.c
> > +++ b/arch/arm/vfp/vfpmodule.c
> > @@ -800,6 +800,24 @@ static struct undef_hook neon_support_hook[] =
> > {{
> >       .cpsr_mask      = PSR_T_BIT,
> >       .cpsr_val       = PSR_T_BIT,
> >       .fn             = vfp_support_entry,
> > +}, {
> > +     .instr_mask     = 0xff000800,
> > +     .instr_val      = 0xfc000800,
> > +     .cpsr_mask      = 0,
> > +     .cpsr_val       = 0,
> > +     .fn             = vfp_support_entry,
> > +}, {
> > +     .instr_mask     = 0xff000800,
> > +     .instr_val      = 0xfd000800,
> > +     .cpsr_mask      = 0,
> > +     .cpsr_val       = 0,
> > +     .fn             = vfp_support_entry,
> > +}, {
> > +     .instr_mask     = 0xff000800,
> > +     .instr_val      = 0xfe000800,
> > +     .cpsr_mask      = 0,
> > +     .cpsr_val       = 0,
> > +     .fn             = vfp_support_entry,
> >  }};
>
> Could someone please kindly review this patch?
> Thanks.

I tested on unisoc sharkl3 platform, and no problems occurred.

Tested-by: Xuewen Yan <xuewen.yan@unisoc.com>

Thanks!

Patchew 2.1-devel-b67e4c2

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